In the second part , we discuss the problem encountered while transferring dsss signal in fh system , and finally a " fh + long error - correcting code " communication solution based on bpsk modulation is presented 在第二部分中,我們討論了將直擴應(yīng)用于跳頻系統(tǒng)所出現(xiàn)的問題,提出了具有良好抗干擾能力的bpsk調(diào)制的“跳頻+長糾錯碼”通信的方案。
Therefore , software radio has greatly mobility and opening . being of these characterics , it has become one of the focuses of communication research at present . in this paper , error - correcting codes of software radio is discussed 本文將對軟件無線電的糾錯碼部分加以敘述,提出了在vhf uhf軟件無線電接收發(fā)送樣機中的糾錯碼方案及其具體的實現(xiàn)方法。
Based on the interlace and concatenation , a new class of error - correcting codes over two - dimension , rs - complex rotary codes , is proposed . rs codes with a great error - correcting ability is the main structure of the new codes 本文在這兩種思想的基礎(chǔ)上,選擇了糾錯能力較強的rs碼和校驗元數(shù)目可調(diào)的復(fù)轉(zhuǎn)碼,設(shè)計構(gòu)造了一種新型的二維糾錯碼? ? rs -復(fù)轉(zhuǎn)碼。
Then we use lifting scheme improve wavelet analysis methods and proposed a kind of digital watermark algorithm based on error - correcting coded which is a method of communication theory and is to correct watermark signal 然后在這一水印算法的基礎(chǔ)上,使用小波提升技術(shù)來改進小波分析方法,再使用通信理論中的糾錯編碼方法對水印信號進行糾錯控制,并提出了一種基于糾錯編碼的數(shù)字水印算法。
So , besides a brief introduction of reed - solomon error - correcting code ( rs code ) , this paper also gives a thorough analysis of rs code ' s application in two - dimensional bar code pdf417 , giving detailed error - correcting principles in gf ( 929 ) 本文簡要介紹了reed - solomon糾錯碼( rs碼)原理,重點分析研究它在pdf417二維條形碼中的應(yīng)用方法,并詳盡地推導(dǎo)了在迦羅華域gf ( 929 )域內(nèi)rs碼的編譯碼方法。
Qr code is a kind of 2d matrix barcode . it has high density , great capacity that will influent coding of 2d - barcode . a rs code is cyclic symbol error - correcting code , which can correct lost or missing data for damaged symbols Qrcode是一種矩陣二維碼,具有信息密度大、容量高的優(yōu)點,因此,譯碼時受噪聲的干擾大,采用糾錯能力比較強的非二進制bch碼中的一類? rs碼進行編碼,可以有效地抗除干擾進行糾錯。
Orthogonal arrays are related to combinatorics , finite fields , geometry and error - correcting codes , etc . the definition of an orthogonal array is simple and natural , and we know many elegant constructions - yet there are at least as many unsolved problems 正交表不但非常有用,而且十分優(yōu)美,它的數(shù)學(xué)理論涉及組合數(shù)學(xué)、有限域、幾何和糾錯碼等領(lǐng)域。它的定義簡單而自然,我們知道它許多優(yōu)美的構(gòu)造,然而也有大量的問題尚未解決。
Chapter 5 gives the design illumination of the rs coder and decoder based on fpga . then it gives the integrated results for realization design of the rs ( 31 , 15 ) error - correcting code . after that , it gives the functional and layout simulation results for the limited field multiplier , divider , rs coder and rs de - coder 第五章給出了基于fpga實現(xiàn)的rs編碼器和譯碼器設(shè)計說明, rs ( 31 , 15 )糾錯碼設(shè)計實現(xiàn)的綜合結(jié)果,有限域乘法器、除法器、 rs編碼器、 rs譯碼器的功能仿真和布局布線后仿真結(jié)果,最后總結(jié)主要的調(diào)試經(jīng)驗。
Low density parity check ( ldpc ) codes are good error - correcting codes , which can approach shannon ' s capacity limit . due to the sparsity of its check matrix , ldpc codes can be decoded only with linear time complexity using iterative decoding algorithm . therefore , ldpc codes have become one of the most attractive fields in the channel coding community 低密度校驗碼是一種逼近香農(nóng)限的好碼,由于其校驗矩陣的稀疏特性,采用迭代譯碼算法,它的譯碼僅具有線性時間復(fù)雜度,所以目前l(fā)dpc碼己成為信道編碼理論界的研究熱點之一。
In order to keep the signal transmission unfailing , bch error - correcting code is applied in the system . this kind of system does n ' t affect the application television broadcasting normally and does n ' t increase video signal bandwidth additionally . it optimizes the transmission circuit for control signals and solves the problem of time - delaying , thereby it promotes the transmission more efficiently and economically 這種新型的應(yīng)用電視在不影響電視正常播放和不增加電視傳輸帶寬的前提下,將控制信號搭載在視頻信號通道上運行,優(yōu)化了控制信號傳輸線路,解決了時延問題,達到了利用電視信號逆程資源的目的,真正意義上實現(xiàn)了單纜傳輸監(jiān)控系統(tǒng),促進了監(jiān)控系統(tǒng)的高效化和經(jīng)濟化。